Measurement on the Internal Stress Distribution in a Thick Specimen with a Patrial Repair Weld Using Mutiple-cut Contour Method

doi:10.3901/JME.2019.18.028

Abstract

Abstract: Residual stress distributions in partial repair welds exhibit 3-D characteristics. It is necessary to perform measurement on internal stresses to investigate the effects of partial repair on welding residual stresses. The internal stress distributions in a 50 mm -thick specimen with a partial repair weld are measured by the contour method with multiple cuts, and the longitudinal and transverse stress distributions in the initial weld, the longitudinal stress distribution in the repair weld are obtained. The effect of the partial repair weld on the welding longitudinal stress distribution is studied. The extent of stress release induced by the transeverse cut at the middle-length location is also investigated. Investigated results show that the full maps of the welding longitudinal and transverse stress distributions can be obtained by the multiple-cut contour method; the peak longitudinal stress within the repair weld increases by 30% as compared with that in the initial weld; due to the heat effect exerted by the multipass welding of the repair weld, the peak longitudinal stress in the region above the partial repair weld decreases by 60% in relation to the peak stress in the initial weld; the extent of stress release caused by the transverse cut changes with the location from the cut edge, the stress within the region with a distance from the cut adge over twice times the thickness is almost unaffected by the cut. The multiple-cut contour method provides an economical and efficient method to investigate the variation of internal stress distribution in a thick welded plate before and after partial repair.

Key words: partial repair weld, internal stress, contour method, extent of stress release, stress superposition

CLC Number:

TG404

YAN Yi, YAN Jialing, LIU Minxing, LI Dan, LIU Chuan, CHU Qiaoling. Measurement on the Internal Stress Distribution in a Thick Specimen with a Patrial Repair Weld Using Mutiple-cut Contour Method[J]. Journal of Mechanical Engineering, 2019, 55(18): 28-35.

References

[1] WITHERS P J. Residual stress and its role in failure[J]. Reports on Progress in Physics,2007,70(12):2211-2264.
[2] 王东坡,霍立兴,张玉凤,等.焊接残余应力对超声波冲击处理焊接接头疲劳性能的影响[J].机械工程学报,2004,40(5):150-154. WANG Dongpo,HUO Lixing,ZHANG Yufeng,et al. Effect of welding residual stress on fatigue performance of the welded joints treated by ultrasonic peening[J]. Journal of Mechanical Engineering,2004,40(5):150-154.
[3] 余陈,陈静,陈怀宁.TC4钛合金磁控窄间隙TIG焊试板热处理前后三维应力[J].机械工程学报,2019,55(6):61-66. YU Chen,CHEN Jing,CHEN Huaining,et al. Triaxial stresses in tc4 ti-alloy weldments by magnetically controlled narrow gap tig welding before and after PWHT[J]. Journal of Mechanical Engineering,2019,55(6):61-66.
[4] 朱援祥,张小飞,杨兵,等.基于有限元的多次补焊焊接残余应力的数值模拟[J].焊接学报,2002,23(1):65-68. ZHU Yuanxiang,ZHANG Xiaofei,YANG Bing,et al. The numeric simulation of weld residual stress of several weld-repaired based on Finite element[J]. Transactions of the China Welding Institution,2002,23(1):65-68.
[5] DONG P,ZHANG J,BOUCHARD P J. Effects of repair weld length on residual stress distribution[J]. Journal of Pressure Vessels Technology,2002,124(1):74-80.
[6] DONG P,HONG J K,BOUCHARD P J. Analysis of residual stresses at weld repairs[J]. International Journal of Pressure Vessels and Piping,2005,82(4):258-269.
[7] SONG S,DONG P. Residual stresses at weld repairs and effects of repair geometry[J]. Science and Technology of Welding and Joining,2017,22(4):265-277.
[8] GEORGE D,SMITH D J. Through thickness measurement of residual stresses in a stainless steel cylinder containing shallow and deep weld repairs[J]. International Journal of Pressure Vessels and Piping,2005,82(4):279-287.
[9] BOUCHARD P J,GEORGE D,SANTISTEBAN J R,et al. Measurement of the residual stresses in a stainless steel pipe girth weld containing long and short repairs[J]. International Journal of Pressure Vessels and Piping,2005,82(4):299-310.
[10] MURANSKY O,HOSSEINZADEH F,HAMELIN C J,et al. Investigating optimal cutting configurations for the contour method of weld residual stress measurement[J]. International Journal of Pressure Vessels and Piping,2018,164:55-67.
[11] PRIME M B. Cross-sectional mapping of residual stresses by measuring the surface contour after a cut[J]. Journal of Engineering Materials & Technology,2001,123:162-168.
[12] 刘川,庄栋.基于轮廓法测试焊接件内部残余应力[J].机械工程学报,2012,48(8):54-59. LIU Chuan,ZHUANG Dong. Internal welding residual stress measurement based on contour method[J]. Journal of Mechanical Engineering,2012,48(8):54-59.
[13] FRANKEL P,PREUSS M,STEUWER A,et al. Comparison of residual stresses in Ti-6Al-4V and Ti-6Al-2Sn-4Zr-2Mo linear friction welds[J]. Materials Science and Technology,2009,25(5):640-650.
[14] BRAGA D F O,COULES H E,PIRLING T,et al. Assessment of residual stress of welded structural steel plates with or without post weld rolling using the contour method and neutron diffraction[J]. Journal of Materials Processing Technology,2013,213(12):2323-2328.
[15] ZHANG Y,GANGULY S,EDWARDS L,et al. Cross-sectional mapping of residual stresses in a VPPA weld using the contour method[J]. Materialia,2004,52(17):5225-5232.
[16] LIU C,ZHU H Y,DONG C L. Internal residual stress measurement on inertia friction welding of nickel-based superalloy[J]. Science and Technology of Welding and Joining,2014,19(5):408-415.
[17] SUN T Z,ROY M J,STRONG D,et al. Comparison of residual stress distributions in conventional and stationary shoulder high-strength aluminum alloy friction stir welds[J]. Journal of Materials Processing Technology,2017,242:92-10.
[18] SMITH M,LEVESQUE J B,BICHLER L,et al. Residual stress analysis in linear friction welded in-service Inconel 718 superalloy via neutron diffraction and contour method approaches[J]. Materials Science and Engineering A,2017,691:168-179.
[19] OLSON M D,HILL M R. A new mechanical method for biaxial residual stress mapping[J]. Experimental Mechanics,2015,55(6):1139-1150.
[20] HOSSEINZADEH F,BOUCHARD P J. Mapping multiple components of the residual stress tensor in a large P91 steel pipe girth weld using a single contour cut[J]. Experimental Mechanics,2013,53(2):171-181.
[21] PAGLIARO P,PRIME M B,ROBINSON J S,et al. Measuring inaccessible residual stresses using multiple methods and superposition[J]. Experimental Mechanics,2011,51(7):1123-1134.